Okay kiddo, a speed limiter is kind of like a rule that a car or truck has to follow to stay safe on the road. It's like a regular limit that your parents might set for you when you're playing outside or eating candy - it's there to keep you from going too fast and getting into trouble.
So for a car or truck, the speed limiter is a special tool that helps keep the vehicle from going too fast. It works by setting a maximum speed that the vehicle can reach - kind of like a speedometer that won't let you go over a certain number.
Sometimes, people use speed limiters to make sure that big trucks or buses don't go too fast while driving on highways or other busy roads. This can help prevent accidents and keep everyone safe on the road.
So, speed limiters are like special rules for cars and trucks to follow so they don't go too fast and cause problems. They help keep everyone safe and make driving a lot less scary!